Erez Metula's Managed Code Rootkits: Hooking into Runtime Environments PDF

Erez Metula's Managed Code Rootkits: Hooking into Runtime Environments PDF

By Erez Metula

Imagine having the ability to swap the languages for the applications that a working laptop or computer is working and taking keep an eye on over it. that's precisely what controlled code rootkits can do after they are put inside of a working laptop or computer. This new form of rootkit is hiding in a spot that had formerly been secure from this sort of attack-the software point. Code stories don't at present search for again doorways within the digital laptop (VM) the place this new rootkit will be injected. An invasion of this importance permits an attacker to thieve details at the contaminated desktop, supply fake details, and disable safety checks. Erez Metula indicates the reader how those rootkits are built and inserted and the way this assault can swap the controlled code that a computer is working, no matter if that be JAVA, .NET, Android Dalvik or the other controlled code. administration improvement situations, instruments like ReFrameworker, and countermeasures are coated, making this booklet a one cease store for this new assault vector.
* Introduces the reader in short to controlled code environments and rootkits in general
* thoroughly information a brand new kind of rootkit hiding within the program point and demonstrates how a hacker can swap language runtime implementation
* makes a speciality of controlled code together with Java, .NET, Android Dalvik and experiences malware improvement scanarios

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Extra info for Managed Code Rootkits: Hooking into Runtime Environments

Example text

It does this by modifying the language upon which the runtime’s application is based, inflicting the customized behavior on the application by accessing the runtime’s internal mechanisms through hooks into methods or by tampering with the internal state maintained by the runtime. In short, an MCR breaks the trust between the application code (assuming a specific behavior of the services provided by the runtime) and the runtime, manipulating the code to do things the code’s developers did not originally intend it to do.

Decompilers also provide information to the attacker regarding how the framework was built, the classes it uses, and how the classes interact. Essentially, a decompiler lets you review the source code of the classes the applications use, and helps you to do the following: • • • • • • Decide where to inject external code. Know what to modify. Highlight interesting classes. Determine class member variable values. Plan how to add code to a given method. Investigate which code to remove from a method (so that it can still work).

Object, so when an object is passed (using the stack, for example) only a reference to the heap’s object is transferred and not the object itself. The heap is often managed by the runtime by some kind of garbage collector, which takes care of all memory management issues such as recognizing objects in use, marking old objects to be discarded, compacting the heap, and so on. As such, memory allocation and reclamation is transparent to the developer and is taken care of in this scenario; in “unmanaged” programming languages such as C/C++ and others, the developer must handle memory issues.

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